Re: [Engine-devel] Developer's All In One
by Allon Mureinik
Cross-posting to engine-devel
> ----- Forwarded Message -----
> From: "Yeela Kaplan" <ykaplan(a)redhat.com>
> To: vdsm-devel(a)lists.fedorahosted.org,
> engine-devel(a)lists.fedorahosted.org
> Cc: "Ayal Baron" <abaron(a)redhat.com>
> Sent: Monday, June 18, 2012 2:58:55 PM
> Subject: Developer's All In One
>
> Enclosed is the link to a wiki containing a detailed explanation for
> installing a developer's All-In-One environment:
>
> http://www.ovirt.org/wiki/Developers_All_In_One
>
> Regards,
> Yeela
>
7 years, 5 months
[Engine-devel] fedora_17_slave_02 on jenkins
by ovirt＠qip.ru
This is a message in Mime Format. If you see this, your mail reader does not support this format.
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Hi, ALL=0A=0AIs it ok that node =0Afedora_17_slave_02 on http://jenkins.=
ovirt.org/computer/fedora_17_slave_02/=0A=0Ahas=0AProcess leaked file de=
scriptors error about two days?=0A=0ABye,=0AVadim=0A=0A--
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Hi, ALL<br><br>Is it ok that node <br><h1>fedora_17_slave_02 on http://j=
enkins.ovirt.org/computer/fedora_17_slave_02/<br></h1><br>has<pre>Proces=
s leaked file descriptors error about two days?</pre><br>Bye,<br>Vadim<b=
r><br><br>--<br><br>
--=_67a3183659adff2f13091192092f3d88--
7 years, 5 months
[Engine-devel] RFC: Writeup on VDSM-libstoragemgmt integration
by Deepak C Shetty
Hello All,
I have a draft write-up on the VDSM-libstoragemgmt integration.
I wanted to run this thru' the mailing list(s) to help tune and
crystallize it, before putting it on the ovirt wiki.
I have run this once thru Ayal and Tony, so have some of their comments
incorporated.
I still have few doubts/questions, which I have posted below with lines
ending with '?'
Comments / Suggestions are welcome & appreciated.
thanx,
deepak
[Ccing engine-devel and libstoragemgmt lists as this stuff is relevant
to them too]
--------------------------------------------------------------------------------------------------------------
1) Background:
VDSM provides high level API for node virtualization management. It acts
in response to the requests sent by oVirt Engine, which uses VDSM to do
all node virtualization related tasks, including but not limited to
storage management.
libstoragemgmt aims to provide vendor agnostic API for managing external
storage array. It should help system administrators utilizing open
source solutions have a way to programmatically manage their storage
hardware in a vendor neutral way. It also aims to facilitate management
automation, ease of use and take advantage of storage vendor supported
features which improve storage performance and space utilization.
Home Page: http://sourceforge.net/apps/trac/libstoragemgmt/
libstoragemgmt (LSM) today supports C and python plugins for talking to
external storage array using SMI-S as well as native interfaces (eg:
netapp plugin )
Plan is to grow the SMI-S interface as needed over time and add more
vendor specific plugins for exploiting features not possible via SMI-S
or have better alternatives than using SMI-S.
For eg: Many of the copy offload features require to use vendor specific
commands, which justifies the need for a vendor specific plugin.
2) Goals:
2a) Ability to plugin external storage array into oVirt/VDSM
virtualization stack, in a vendor neutral way.
2b) Ability to list features/capabilities and other statistical
info of the array
2c) Ability to utilize the storage array offload capabilities from
oVirt/VDSM.
3) Details:
LSM will sit as a new repository engine in VDSM.
VDSM Repository Engine WIP @ http://gerrit.ovirt.org/#change,192
Current plan is to have LSM co-exist with VDSM on the virtualization nodes.
*Note : 'storage' used below is generic. It can be a file/nfs-export for
NAS targets and LUN/logical-drive for SAN targets.
VDSM can use LSM and do the following...
- Provision storage
- Consume storage
3.1) Provisioning Storage using LSM
Typically this will be done by a Storage administrator.
oVirt/VDSM should provide storage admin the
- ability to list the different storage arrays along with their
types (NAS/SAN), capabilities, free/used space.
- ability to provision storage using any of the array capabilities
(eg: thin provisioned lun or new NFS export )
- ability to manage the provisioned storage (eg: resize/delete storage)
Once the storage is provisioned by the storage admin, VDSM will have to
refresh the host(s) for them to be able to see the newly provisioned
storage.
3.1.1) Potential flows:
Mgmt -> vdsm -> lsm: create LUN + LUN Mapping / Zoning / whatever is
needed to make LUN available to list of hosts passed by mgmt
Mgmt -> vdsm: getDeviceList (refreshes host and gets list of devices)
Repeat above for all relevant hosts (depending on list passed earlier,
mostly relevant when extending an existing VG)
Mgmt -> use LUN in normal flows.
3.1.2) How oVirt Engine will know which LSM to use ?
Normally the way this works today is that user can choose the host to
use (default today is SPM), however there are a few flows where mgmt
will know which host to use:
1. extend storage domain (add LUN to existing VG) - Use SPM and make
sure *all* hosts that need access to this SD can see the new LUN
2. attach new LUN to a VM which is pinned to a specific host - use this host
3. attach new LUN to a VM which is not pinned - use a host from the
cluster the VM belongs to and make sure all nodes in cluster can see the
new LUN
Flows for which there is no clear candidate (Maybe we can use the SPM
host itself which is the default ?)
1. create a new disk without attaching it to any VM
2. create a LUN for a new storage domain
3.2) Consuming storage using LSM
Typically this will be done by a virtualization administrator
oVirt/VDSM should allow virtualization admin to
- Create a new storage domain using the storage on the array.
- Be able to specify whether VDSM should use the storage offload
capability (default) or override it to use its own internal logic.
4) VDSM potential changes:
4.1) How to represent a VM disk, 1 LUN = 1 VMdisk or 1 LV = 1 VMdisk ?
which bring another question...1 array == 1 storage domain OR 1
LUN/nfs-export on the array == 1 storage domain ?
Pros & Cons of each...
1 array == 1 storage domain
- Each new vmdisk (aka volume) will be a new lun/file on the array.
- Easier to exploit offload capabilities, as they are available at
the LUN/File granularity
- Will there be any issues where there will be too many LUNs/Files
... any maxluns limit on linux hosts that we might hit ?
-- VDSM has been tested with 1K LUNs and it worked fine - ayal
- Storage array limitations on the number of LUNs can be a downside
here.
- Would it be ok to share the array for hosting another storage
domain if need be ?
-- Provided the existing domain is not utilising all of the
free space
-- We can create new LUNs and hand it over to anyone needed ?
-- Changes needed in VDSM to work with raw LUNs, today it only has
support for consuming LUNs via VG/LV.
1 LUN/nfs-export on the array == 1 storage domain
- How to represent a new vmdisk (aka vdsm volume) if its a LUN
provisioned using SAN target ?
-- Will it be VG/LV as is done today for block domains ?
-- If yes, then it will be difficult to exploit offload
capabilities, as they are at LUN level, not at LV level.
- Each new vmdisk will be a new file on the nfs-export, assuming
offload capability is available at the file level, so this should work
for NAS targets ?
- Can use the storage array for hosting multiple storage domains.
-- Provision one more LUN and use it for another storage domain
if need be.
- VDSM already supports this today, as part of block storage
domains for LUNs case.
Note that we will allow user to do either one of the two options above,
depending on need.
4.2) Storage domain metadata will also include the features/capabilities
of the storage array as reported by LSM.
- Capabilities (taken via LSM) will be stored in the domain
metadata during storage domain create flow.
- Need changes in oVirt engine as well ( see 'oVirt Engine
potential changes' section below )
4.3) VDSM to poll LSM for array capabilities on a regular basis ?
Per ayal:
- If we have a 'storage array' entity in oVirt Engine (see 'oVirt
Engine potential changes' section below ) then we can have a 'refresh
capabilities' button/verb.
- We can periodically query the storage array.
- Query LSM before running operations (sounds redundant to me, but
if it's cheap enough it could be simplest).
Probably need a combination of 1+2 (query at very low frequency -
1/hour or 1/day + refresh button)
5) oVirt Engine potential changes - as described by ayal :
- We will either need a new 'storage array' entity in engine to
keep credentials, or, in case of storage array as storage domain, just
keep this info as part of the domain at engine level.
- Have a 'storage array' entity in oVirt Engine to support
'refresh capabilities' as a button/verb.
- When user during storage provisioning, selects a LUN exported
from a storage array (via LSM), the oVirt Engine would know from then
onwards that this LUN is being served via LSM.
It would then be able to query the capabilities of the LUN and
show it to the virt admin during storage consumption flow.
6) Potential flows:
- Create snapshot flow
-- VDSM will check the snapshot offload capability in the
domain metadata
-- If available, and override is not configured, it will use
LSM to offload LUN/File snapshot
-- If override is configured or capability is not available, it
will use its internal logic to create
snapshot (qcow2).
- Copy/Clone vmdisk flow
-- VDSM will check the copy offload capability in the domain
metadata
-- If available, and override is not configured, it will use
LSM to offload LUN/File copy
-- If override is configured or capability is not available, it
will use its internal logic to create
snapshot (eg: dd cmd in case of LUN).
7) LSM potential changes:
- list features/capabilities of the array. Eg: copy offload, thin
prov. etc.
- list containers (aka pools) (present in LSM today)
- Ability to list different types of arrays being managed, their
capabilities and used/free space
- Ability to create/list/delete/resize volumes ( LUN or exports,
available in LSM as of today)
- Get monitoring info with object (LUN/snapshot/volume) as optional
parameter for specific info. eg: container/pool free/used space, raid
type etc.
Need to make sure above info is listed in a coherent way across arrays
(number of LUNs, raid type used? free/total per container/pool, per
LUN?. Also need I/O statistics wherever possible.
7 years, 5 months
Re: [Engine-devel] Forking unit tests
by Allon Mureinik
----- Original Message -----
> From: "Allon Mureinik" <amureini(a)redhat.com>
> To: "Mike Kolesnik" <mkolesni(a)redhat.com>
> Sent: Thursday, June 14, 2012 12:12:54 PM
> Subject: Re: Forking unit tests
>
>
>
> ----- Original Message -----
> > From: "Mike Kolesnik" <mkolesni(a)redhat.com>
> > To: "Allon Mureinik" <amureini(a)redhat.com>
> > Cc: "Laszlo Hornyak" <lhornyak(a)redhat.com>, "engine-devel"
> > <engine-devel(a)ovirt.org>
> > Sent: Wednesday, June 13, 2012 1:28:36 PM
> > Subject: Re: Forking unit tests
> >
> > > Hi guys,
> > >
> > > If you're using settings.xml as published in Building the oVirt
> > > Engine page, you'd see we're forking for every test, in every
> > > subproject.
> > > This behaviour was introduced to handle memory leaks in PowerMock
> > > we
> > > use in some subprojects, but is redundant in others.
> > >
> > > Over the past month or so I've been working on removing PowerMock
> > > from as many places as possible (many thanks to mkolesni and
> > > lhornyak!), and we've got to the stage that forking is only
> > > needed
> > > in to subprojects - bll and resttypes.
> >
> > +1 - great job!
> 10x!
>
> >
> > Would it be possible to have this as a parameter (defaul true) that
> > can be overridden, such as -Dengine.forkTests=false ?
> couldn't find a good way to do it <forkMode> doesn't seem to work
> when given a property as a value, sorry.
> :-(
Take a look at http://gerrit.ovirt.org/#/c/5653/1.
Once it is merged, you could user -Dengine.powermock.fork=one to stop forking.
>
> >
> > > The forking was defined explicitly in those two projects, so if
> > > you
> > > want to speed up your tests, just take the latest version of
> > > settings.xml from
> > > http://ovirt.org/wiki/Building_oVirt_engine#Maven_personal_settings.
> > >
> > >
> > > -Allon
> > >
> >
>
7 years, 5 months
Re: [Engine-devel] 3.1 Release Notes
by Steve Gordon
Hi guys,
As you all know we have a new release coming up shortly, and as
discussed in the sync meeting last week I'm getting ready to prepare
the release notes for it. To do that I need some help though, as it
currently stands there are no bugs against the oVirt project with a
target release of 3.1 and the ovirt_requires_release_note? flag set.
If you are the maintainer of one of the sub-projects please ensure
that you flag all notable features/fixes included in the 3.1*
release with ovirt_requires_release_notes? and, ideally, add a brief
description in the technical notes field. If you don't have access
to set the flag for some reason then please reply to this email with
a list of bugs instead.
I know you've all been working very hard on this release, but without
your input into this process I can not hope to accurately capture
and highlight your efforts in the release notes.
Thanks,
Steve
* I have assumed target release = 3.1 is the best flag to use in
Bugzilla to determine which bugs are likely to be included in the
release - if there is a better value to filter on please let me
know.
7 years, 5 months
[Engine-devel] GWT 2.4.0 and the oVirt Engine
by Schoenbrun, Dustin
--_000_CC06582EA7BFdustinschoenbrunnetappcom_
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Hey All,
I was looking at doing some work with extending the oVirt Engine GUI but so=
me of the functionality that I need (such as dynamic creation of tabs) is o=
nly supported in GWT 2.4.0. What sort of steps would have to be taken to u=
pdate the Engine to GWT 2.4.0? Also, what would be the easiest way of debu=
gging and testing these updates through Eclipse, for example. Thanks in ad=
vance!
-- Dustin
--_000_CC06582EA7BFdustinschoenbrunnetappcom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif; ">
<div>
<div>
<div>Hey All,</div>
<div><br>
</div>
<div>I was looking at doing some work with extending the oVirt Engine GUI b=
ut some of the functionality that I need (such as dynamic creation of tabs)=
is only supported in GWT 2.4.0. What sort of steps would have to be =
taken to update the Engine to GWT 2.4.0?
Also, what would be the easiest way of debugging and testing these u=
pdates through Eclipse, for example. Thanks in advance!</div>
<div><br>
</div>
<div>
<div>
<div>-- Dustin</div>
<div><br>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
--_000_CC06582EA7BFdustinschoenbrunnetappcom_--
7 years, 5 months
[Engine-devel] 3.1 bugs
by Itamar Heim
I have moved all MODIFIED bugs to ON_QA with target release of 3.1[1]
This will allow to easily distinguish them from bugs fixed from now on,
and will allow reporters to try and verify the fix, should they choose to.
Plan is to close them currentrelease when 3.1 is released.
Thanks,
Itamar
7 years, 5 months
